I have learned a lot from this lesson. Here are the things I would like to share:
Noun- all things around have names. Those names are considered as nouns. There are different kind of nouns. It could be Common or Proper.
Adjectives- It is the word that describes the noun or subject.
Pronoun-it is the alternative we use for changing the name of subject.
Adverb-there are many types like for manner, it modifies how the action done and so on.